Glow lamp



Dec. l2, 1939.

L'. A. HERzlG GLow LAM;j

Filed .June 17 19:57

ego 000 l. Another object is to provide a scanningsystem I5 is povidedwith a simila? aperture I9 which 15 Patentes pee. 12, 1939 l d o2,183,042

UNIT-ED "s'm'rssI PATENT I OFFICE .Leonard A. Herzig, Brooklyi'nN. Y.,assignor, by

mesne assignments, to Lon-Ga-Tone, Inc.,

leug York County, N. Y., a corporation of New Application June 17,lil'l, Serial No. 148,634

2 oloims. (c1. 11e-122) l This invention relates to glow lamps for usein .006 which ls bent into the form of a V having recording sound on orreproducing' sound from a kan opening of about Va". photographic soundrecord and particularly to a An anode plate I4 is positioned over thefront of f glow lamp for use with a lm which is adapted to the block Iand is separated from the cathode I2 5 contain a plurality of spacedparallel sound record by means of a layer of insulating' material I5such 5 tracks. as isinglass, mica or the like. The anode plate I4 Anobject of the invention is to provide a'glow has a pair of side flangesIIi'which extend around lamp which is adapted to project a light ofequal the sides of the block I0 and are seated in suitable intensityacross the entire active area of the lm recesses I1 therein so as toform a shield for the so that the various sound record tracks can belight rays. The anode plate I4 is provided with l0 scanned withoutshifting the position of the lamp. an elongated aperture t8 which mayfor example Another object of the invention is to provide a have a widthof .007" and may have a length of glow lamp of simple and sturdyconstruction in about 1", the length depending upon the Width of whichthe light is eflciently utilized. the film to be scanned. The.insulating material in which the scanning ray can be shifted from` Vmaybe substantially larger than the aperture I8 one sound record track tothe next without physiso as not tointerfere with the passage of lightcally moving either the glow lamp lor thelm. rays therethrough. Althoughthe novel features which are believed The block I0 may be supported inany suitable zo to be characteristic of this invention will be moremanner. In the formshown this block is-Supzo particularly 'pointed out#in the claims appended ported by a pair of vertical rods 20 and 2| whichhereto,`the invention will be `better understood by are connectedrespectively to posts 22 and 23, referring to the following descriptiontaken in. mounted in the glass Support 6 and connected by connectionwith the accompanying drawing, 1n leads 24 and 25 respectively'to prongs'5 and 3. which a specific embodiment of the invention has T he rods 20and 2l are positioned in suitable 25 been set forth for purposes ofmustration, and 1n recesses 21 and 28 extending vertically along Ichewhich; sides of the block I0. f

Fig. -1 is. an elevation of a glow lamp embodying The rod 2l isextended'over the top ofthe block the inventom. i d. I0 to connect withan ear 29 formed on the top of Fig. v2 iis a front elevation of the glowlamp .the anode Plate l" A Swim!"t 3 may be 0X- so f f. elements withthe glss envelope remuved; A tended across the bottom of the anodeplate' I4 Figs is avertiealseetion through the glow lamp and may be bentrearwardly at the Side 0f the elements; ibli'ilcllli I0 at? 2eonigsagctthe lower ertid of the rod 2l.

- e r e ended over he top of the block gg: 45255 aafffggntgfif 5 5 .ofrm 2; lo anais provided with o downward extension 3| 35 Fig. '6 is asection taken on line 6-.6of Fig. 2; y which' enters 'the-aperture withmthe V'sharfed and l cgthodhl! and extlinds;l gwnwarrily tolsa point A wa ove eupper en o e aperure .soln daingiasggfnggglgg illllslgeextenslonfll is out of engagement with both -the 40 glow lamp vanodeplate I4 and. .the/cathode 4I2 and forms an 40 In the drawing, th;invention is shown as apgliblry. anode for a purpose hereinafter de'?geo o? 3:; arnhecigenbgnze; I 'I'heprong 4 is/connected byA means of alead 32 having -a plurality of connector prongs 3 4 and 5 to a pm 33which is car ed by'the'glass support 45 which are adapted to be insertedin a standard gaatg cured to the lower end of the V'shaped socket Thi?base @Wines a support s 0f glss 91' In the lamp thus far described theglow `'clis- 311e nkrg which the elements t0 be described #re chargetakes place between the V-shaped cathode vvliilf; ele-ments of th l lrise I2 and the anode plate I4 to produce alight of v s... ...mi.zessen-os este v g passes. oug e ill-gsllial ilyafhai-ng hilsl at On 9'aperture I8 and thereafter may be focussedon the n is .griged w c a apedca e nlm to scanned. The auxiliary anode lis moun This cathode I2 may bemade adapted to apply a. fixed voltage lto the lamp .as

yu from a tantaluni sheet having a thickness of about to prevent thedischarge from being extinguished when a loud passage or blastingoccurs, thereby tending to prevent distortion and to improve theoperation of the lamp. The envelope may be filled with argon andnitrogen, or with other suitable gas so as to intensify the blue colorspectrum which is particularly suitable for recording on standardphotographic films.

In the system shown in Fig. 7 the glow lamp is shown connected to theoutput circuit of an amplier 40, the input circuit of which is connectedto a microphone lil. It is to be understood that the microphone 4lrepresents any suitable sound pickup device such as a mechanical pickupfor disc phonograph records, a photoelectric pickup device or the outputof any audio frequency circuit. The output circuit of the amplifier 4Umay include a battery 42 which may, for example, supply a potential of600 volts between the anode plate it and the cathode I2. The auxiliaryanode 3l may be connected to the anode plate it through a highresistance 44 such for example as a resistance of 100,000 to 500,000ohms so as to supply a sumciently high potential "to the auxiliary anodeto prevent the discharge from being extinguished due to uctuations inthe main anode potential.

In accordance with this system the audio frequency currents receivedfrom the microphone or the like lll are suitably amplied in the amplierll and are impressed between the anode and cathode of the glow lamp tocause a correspondingly fluctuating glow discharge therebetween. Thisglow discharge may be focussed across a iilm 50 by means of acylindrical lens assembly l which is adapted to receive light.

from the-entire length of the aperture E8 and to focus the same in theform of a narrow beam extending across the entire active area of the lm50. An aperture plate 52 may be provided having an aperture 53 of a sizeto pass rays to a selected sound record track only on the lm 50.Suitable means may be provided for shifting the aperture plate 52transversely of the film to progressively scan the successive soundrecord tracks.

It is to be noted that light of equal intensity is supplied to all ofthe sound record tracks as the aperture plate 52 is shifted for scanningpurposes. The system accordingly provides for successively scanning thevarious sound record tracks of the film without physically shiftingeither the glow lamp or the film. Since the glow lamp remainsstationary, distortion due to jarring the same by sudden movement iseliminated and the life of the glow lamp is materially increased.Furthermore a more accurate focussing can be obtained because all of theelements remain at xed distances, only the aperture plate 52 beingmovable. It is to be further noted that the aperture I8 is so narrowthat the lamp may be placed comparatively close to the lm. Consequentlythe light loss due to dispersion of the light from the focussing pointis maintained at a minimum.

It is to be understood that the lens assembly 5E could be made movablewith the aperture plate 52 if desired, but in any event the glow lampwould remain stationary throughout the scanning operation.

Although a particular embodiment of the invention has been shown anddescribed for purposes of illustration, it is to be understood that theinvention is capableof various uses and it will be evident that variouschanges and modiiications may be made therein as will be ap parent to aperson skilled in the art. The invention is only to be limited inaccordance with the following claims when interpreted in view of theprior art.

The invention claimed is:

1. A glow lamp comprising an elongated cathode of open V-shaped crosssection, an anode plate mounted across the open face of said cathode,said anode plate having an elongated aperture registering with saidcathode to pass light therefrom in the form of a long narrow beam, and asecond anode extending into the space between said anode plate andcathode and insulated therefrom.

2. A glow lamp comprising a block of refractory insulating material, anelongated cathode lof v-shaped cross section mounted in the face of saidblock, an anode plate mounted across the face of said block andinsulated from saidcathode, said anode plate having an elongatedaperture registering with said cathode to pass light therefrom in theform of a long narrow beam, and a second anode carried by said block andextending within the space between said anode plate and said cathode andinsulated therefrom.

LEONARD A. HERZIG.

